P064D OBD II Trouble Code Internal Control Module O2 Sensor Processor Performance Bank 1

How to quickly diagnose, repair, and info on symptoms and causes of a P064D code which indicates a detected PCM internal bank 1 O2 sensor processor performance problem.

Symptoms of P064D OBD II Trouble Code

  • Diminished fuel efficiency
  • A general lack of engine performance
  • A variety of engine drivability symptoms
  • Other stored diagnostic trouble codes

Common Causes of P064D OBD II Trouble Code

  • Defective controller or programming error
  • Faulty HO2S
  • Rich or lean exhaust conditions
  • Burnt, chafed, broken, or disconnected wiring and/or connectors
  • Engine exhaust leaks
  • A bad controller power relay or blown fuse
  • Open or shorted circuit or connectors in the CAN harness
  • Insufficient control module ground

Severity of P064D OBD II Trouble Code

Internal control module processor codes should be categorized as severe. A stored code P064D could result in a variety of drivability concerns, including diminished fuel efficiency.